diff --git a/lib/libkse/thread/thr_sig.c b/lib/libkse/thread/thr_sig.c
index 49a1c397d85f..1250a95e4d34 100644
--- a/lib/libkse/thread/thr_sig.c
+++ b/lib/libkse/thread/thr_sig.c
@@ -893,7 +893,8 @@ static void
 thr_sigframe_save(struct pthread *thread, struct pthread_sigframe *psf)
 {
 	/* This has to initialize all members of the sigframe. */
-	psf->psf_flags = thread->flags & THR_FLAGS_PRIVATE;
+	psf->psf_flags =
+		 thread->flags & (THR_FLAGS_PRIVATE|THR_FLAGS_IN_TDLIST);
 	psf->psf_interrupted = thread->interrupted;
 	psf->psf_signo = thread->signo;
 	psf->psf_state = thread->state;
diff --git a/lib/libpthread/thread/thr_sig.c b/lib/libpthread/thread/thr_sig.c
index 49a1c397d85f..1250a95e4d34 100644
--- a/lib/libpthread/thread/thr_sig.c
+++ b/lib/libpthread/thread/thr_sig.c
@@ -893,7 +893,8 @@ static void
 thr_sigframe_save(struct pthread *thread, struct pthread_sigframe *psf)
 {
 	/* This has to initialize all members of the sigframe. */
-	psf->psf_flags = thread->flags & THR_FLAGS_PRIVATE;
+	psf->psf_flags =
+		 thread->flags & (THR_FLAGS_PRIVATE|THR_FLAGS_IN_TDLIST);
 	psf->psf_interrupted = thread->interrupted;
 	psf->psf_signo = thread->signo;
 	psf->psf_state = thread->state;